"""
正则表达式
"""

# match
import re

s="_itheima1 @@python2 !!666 ##itcast3"
r="itheima"
# result=re.match(r,s)
# print(result)


# search
# result=re.search(r,s)
# print(result)

# findall
result=re.findall("6",s)
print(result)